Someone I know offered me some of their spliff a few years ago and I thought I'd give it a go. First puff did nothing, nor second or third, then all of a sudden it hit me. It felt like I had an elastic band round my head, I had lockjaw, and I was sure the floor was sloping so I had to hold onto the table to stop my chair "rolling away." Funniest thing according to my Mrs was my prolific use of the word b*gger. Apparently in one sentence I managed to say "B*gger me, you really b*ggered that up, you silly b*gger. Now stop b*ggering about." Not the best experience, and certainly my last.